<?php
$query = mysql_query("select * from dt_modules where `type`='issuu' and `m_visible`='1' and `m_id` ='".$dRow['m_id']."'");
while ($qRow = mysql_fetch_array($query)){
    $q3 = mysql_query("select * from dt_issuu where m_id = '".$dRow['m_id']."'");
    while ($q3Row = mysql_fetch_array($q3)){
        echo $q3Row['content'];
    }
}
?>